EP 3704423 A1 20200909 - AIR FLOW SENSOR AND MEASURING METHOD THEREFOR
Title (en)
AIR FLOW SENSOR AND MEASURING METHOD THEREFOR
Title (de)
LUFTSTRÖMUNGSSENSOR UND MESSVERFAHREN DAFÜR
Title (fr)
CAPTEUR D'ÉCOULEMENT D'AIR ET PROCÉDÉ DE MESURE ASSOCIÉ
Publication
Application
Priority
- GB 201717854 A 20171030
- IB 2018058505 W 20181030
Abstract (en)
[origin: GB2568041A] An air flow sensor 2 comprising: a housing 4 having an inflow aperture, outflow aperture 16, air flow pathway from the inflow aperture to the outflow aperture; a first sensing element 28 exposed to the air flow pathway; and second sensing element 30 isolated from the air flow pathway. The second element comprises a temperature sensing element 30 comprising a negative temperature coefficient (NTC) resistor, wherein the first element comprises at least one diode 28, and wherein the elements are arranged to be heated equally. A comparator may also be arranged to compare element outputs. An input air redirecting member extends from the housing to redirect air into the inflow aperture. A guiding surface may be arranged to reduce pressure at the outflow aperture. Two parallel pathways may be provided comprising a sensor and a relief pathway. An internal baffle may be situated between the inflow and outflow apertures. An internal divider may divide the sensor housing into active and isolated sections, wherein the isolated section is substantially isolated from any airflow between the inflow and outflow on a parallel path. The elements may be printed circuit board (PCB) mounted partially forming the divider. The air flow sensor may be used in a fan application.
IPC 8 full level
F24F 11/74 (2018.01); F02D 41/18 (2006.01); F24F 11/88 (2018.01); G01F 1/684 (2006.01); G01F 5/00 (2006.01); G01P 5/10 (2006.01); F24F 110/30 (2018.01)
CPC (source: EP GB)
F02D 41/18 (2013.01 - EP); F24F 11/00 (2013.01 - GB); F24F 11/0001 (2013.01 - GB); F24F 11/74 (2018.01 - EP); F24F 11/88 (2018.01 - EP); G01F 1/684 (2013.01 - EP); G01F 1/6842 (2013.01 - GB); G01P 21/025 (2013.01 - EP); F24D 2220/04 (2013.01 - GB); F24F 2110/30 (2018.01 - EP); G01F 1/688 (2013.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
GB 201717854 D0 20171213; GB 2568041 A 20190508; GB 2568041 B 20221130; EP 3704423 A1 20200909; EP 3704423 B1 20230719; EP 3704423 B8 20230830; EP 3704423 C0 20230719; WO 2019087075 A1 20190509
DOCDB simple family (application)
GB 201717854 A 20171030; EP 18807127 A 20181030; IB 2018058505 W 20181030